Question 1

What is the molecular shape of SiF62− as predicted by the VSEPR theory?

Accepted Answer

A) Trigonal bipyramidal 
B) Hexagonal 
C) Tetrahedral 
D) See-saw 
E) Octahedral 
A) Trigonal bipyramidal 
B) Hexagonal 
C) Tetrahedral 
D) See-saw 
E) Octahedral

Question 2

In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

Accepted Answer

A) 0 
B) +1 
C) −1 
D) +2 
E) −2 
A) 0 
B) +1 
C) −1 
D) +2 
E) −2

Question 3

How many faces and how many vertexes (corners), respectively, are there in a trigonal bipyramid?

Accepted Answer

A) 4 and 4 
B) 5 and 5 
C) 5 and 6 
D) 6 and 5 
E) 6 and 8 
A) 4 and 4 
B) 5 and 5 
C) 5 and 6 
D) 6 and 5 
E) 6 and 8

Question 4

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Accepted Answer

A) 90° 
B) 109° 
C) 120° 
D) 180° 
E) between 110 and 120° 
A) 90° 
B) 109° 
C) 120° 
D) 180° 
E) between 110 and 120°

Question 5

Bond angles of 180° only occur around atoms which display linear molecular geometry.

Accepted Answer

A) True 
 B)False

Question 6

What is the molecular shape of ClF4− as predicted by the VSEPR theory?

Accepted Answer

A) Square pyramidal 
B) Square planar 
C) See-saw 
D) Octahedral 
E) Tetrahedral 
A) Square pyramidal 
B) Square planar 
C) See-saw 
D) Octahedral 
E) Tetrahedral

Question 7

Select the correct Lewis structure for TeBr2.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 8

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Accepted Answer

A) PCl 3 
B) BF 3 
C) SO 3 
D) BrF 3 
E) CO 3 2− 
A) PCl 3 
B) BF 3 
C) SO 3 
D) BrF 3 
E) CO 3 2−

Question 9

The formal charge on Cl in the structure shown for the perchlorate ion is

Accepted Answer

A) −2 
B) −1 
C) 0 
D) +1 
E) +2 
A) −2 
B) −1 
C) 0 
D) +1 
E) +2

Question 10

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Accepted Answer

A) True 
 B)False

Question 11

What is the molecular shape of ClF2− as predicted by the VSEPR theory?

Accepted Answer

A) Linear 
B) Bent 
C) See-saw 
D) T-shaped 
E) L-shaped 
A) Linear 
B) Bent 
C) See-saw 
D) T-shaped 
E) L-shaped

Question 12

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory?

Accepted Answer

A) Square planar 
B) Tetrahedral 
C) Square pyramidal 
D) See-saw 
E) Octahedral 
A) Square planar 
B) Tetrahedral 
C) Square pyramidal 
D) See-saw 
E) Octahedral

Question 13

Which of the following atoms can expand its valence shell when bonding?

Accepted Answer

A) N 
B) C 
C) O 
D) P 
E) Al 
A) N 
B) C 
C) O 
D) P 
E) Al

Question 14

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Accepted Answer

A) 5 and 6 
B) 4 and 2 
C) 3 and 6 
D) 4 and 6 
E) 3 and 2 
A) 5 and 6 
B) 4 and 2 
C) 3 and 6 
D) 4 and 6 
E) 3 and 2

Question 15

According to VSEPR theory, a molecule with the general formula AX3E2 will have a __________ molecular shape.

Accepted Answer

A) trigonal pyramidal 
B) trigonal bipyramidal 
C) trigonal planar 
D) T-shaped 
E) see-saw 
A) trigonal pyramidal 
B) trigonal bipyramidal 
C) trigonal planar 
D) T-shaped 
E) see-saw

Question 16

In which one of the following molecules are all the bonds single?

Accepted Answer

A) O 3 
B) POCl 3 
C) CO 
D) COCl 2 
E) N 2H 4 
A) O 3 
B) POCl 3 
C) CO 
D) COCl 2 
E) N 2H 4

Question 17

In formaldehyde, CH2O, both the formal charge and the oxidation number of carbon are zero.

Accepted Answer

A) True 
 B)False

Question 18

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

Accepted Answer

A) CO 2 
B) ClO 3 − 
C) COCl 2 
D) NO 2 + 
E) HCN 
A) CO 2 
B) ClO 3 − 
C) COCl 2 
D) NO 2 + 
E) HCN

Question 19

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2−.

Accepted Answer

A) Octahedral 
B) Trigonal bipyramidal 
C) Tetrahedral 
D) Trigonal planar 
E) Bent 
A) Octahedral 
B) Trigonal bipyramidal 
C) Tetrahedral 
D) Trigonal planar 
E) Bent

Question 20

Predict the ideal bond angles in FNO using the molecular shape given by the VSEPR theory.

Accepted Answer

A) 90° 
B) 109° 
C) 120° 
D) 180° 
E) between 120 and 180° 
A) 90° 
B) 109° 
C) 120° 
D) 180° 
E) between 120 and 180°

Exam 10: The Shapes of Molecules

What is the molecular shape of SiF62− as predicted by the VSEPR theory?

In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

How many faces and how many vertexes (corners), respectively, are there in a trigonal bipyramid?

Predict the ideal bond angles in AsCl3 using the molecular shape given by the VSEPR theory.

Bond angles of 180° only occur around atoms which display linear molecular geometry.

What is the molecular shape of ClF4− as predicted by the VSEPR theory?

Select the correct Lewis structure for TeBr2.

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

The formal charge on Cl in the structure shown for the perchlorate ion is

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

What is the molecular shape of ClF2− as predicted by the VSEPR theory?

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory?

Which of the following atoms can expand its valence shell when bonding?

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

According to VSEPR theory, a molecule with the general formula AX3E2 will have a __________ molecular shape.

In which one of the following molecules are all the bonds single?

In formaldehyde, CH2O, both the formal charge and the oxidation number of carbon are zero.

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2−.

Predict the ideal bond angles in FNO using the molecular shape given by the VSEPR theory.

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

What is the molecular shape of SiF₆²⁻as predicted by the VSEPR theory?

In the COCl₂ molecule, carbon is the central atom. Based on the best Lewis structure for COCl₂, what is the formal charge on carbon?

Predict the ideal bond angles in AsCl₃using the molecular shape given by the VSEPR theory.

What is the molecular shape of ClF₄⁻ as predicted by the VSEPR theory?

Select the correct Lewis structure for TeBr₂.

According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

What is the molecular shape of ClF₂⁻ as predicted by the VSEPR theory?

What is the molecular shape of XeO₂F₂as predicted by the VSEPR theory?

According to VSEPR theory, a molecule with the general formula AX₃E₂will have a __________ molecular shape.

In formaldehyde, CH₂O, both the formal charge and the oxidation number of carbon are zero.

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF₂⁻_.